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A. H. ADAMS.

BORING BRAOE.

(No Model.)

Patented July 31. 1883;

WITNESSES 2c.

C .dttorney! wmna ra hu. Washington. D. C.

,AZRO H. ADAMS,

UNITED STATES PATENT OFFICE.

OF SANTA ROSA, CALIFORNIA, ASSIGNOB OF ONE-FOURTH TO JOSEPH G. HURLEY, OF SAME PLACE.

BORlNG-BRACE.

SPECIFICATION forming part of Letters Patent No. 282,251, dated July 31, 1883. 7

Application filed April 20, 1883.

To all whom it may concern.-

Be it known that I, Az'ao H. ADAMS, a citizen of the United States, residing at Santa Rosa, in the county of Sonoma and State of California, have invented certain new and useful Improvements in Boring-Braces, of which the following is aspecification, reference being had therein to the accompanying drawings.

My invention relates to a boring-brace; and it consists in the parts which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a side view of my improvement, parts being broken away to better illustrate the device. Fig. 2 indicates a section on the line 00 a: of Fig. 1.

In the two views like letters represent like parts.

A represents a cap revolubly mounted on the spindle B of the crank B.

G is a crown-wheel rigidly united to the lower end of crank B. Said crown-wheel is provided with a rim-having inwardly-projecting teeth 0. p

D is a block through which the bit-spindles E pass.

" D is a spindle fixed to the projection D of block D. Said spindle passes through the crown-wheel (land lower end of crank B, as

shown by dotted lines, and it is revolubly mounted thereon.

D is a pin in the upper end of spindleD to secure said spindle and block D i in position. E is the spindle of pinion F. E is a socket in bit-holder E.

G is an opening in block D, adapted to admit the fingers of the operators hand for the purpose of holding said block and the bits in place while the device is being used.

The operation is as follows: The cap A and crank B are of ordinary construction. By

(No model.)

turning said crank the crown-wheel C, which i rests upon the projection D is revolved around the spindle D. Such movement causes the spurs G to rotate the pinions F, spindles E, and bit-holders F. It will thus be seen that when said holders areprovided with bits two holes may be bored at the sametime. It will be seen that one of the pinions and spindles E can be dispensed with, and yet leave one bit- 5c holder adapted for use; or three or more of said pinions, spindles, and holders might be simultaneously used without departing from the spirit of my invention.

Having thus described my device and set forth its advantages, I claim as new and desire to secure by Letters Patent- 1. In a boring-brace, the crank B, having the crown-wheel 0 fixed to the lower end thereof, in combination with the hand-block 6( D, provided with the upper projections, D

D, the pinions F, and spindles E, the pinions F, mounted on the shoulder of block D, and the spindles E, incased in said block, substantially as described,and for the purposes set fOIfill. 771 In testimony whereof I affix my signature in presence of two witnesses.

AZBO H. Animus.

\Vitnesses JAMES H. McGEn, ALBERT G. SHANNON. 

